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2 Safety
2.3 Safety instructions
Risk of lethal electric shock.
• Work on the Sunny String-Monitor may only be performed after switching off the power to the
unit in accordance with the regulations applicable to the installation site:
– Disconnect
– Ensure that the device cannot be reconnected
– Ensure that no voltage or current is present
– Cover or isolate adjacent live elements
Risk of lethal electric shock. The fuse holders are also energized when the string fuse is
disconnected.
• The Plexiglas covers must always be mounted, to ensure protection against direct touching.
• Only insert the fuses when wearing personal protective equipment.
• Only plug in or unplug the Solar Plug when no current is present.
Danger of electric shock due to incorrect procedure. Serious injuries, burns and material
damage.
• All work on the Sunny String-Monitor must be carried out strictly according to the instructions
in this guide.
• Observe all safety precautions.
• Wear personal protective equipment during work on electrical devices.
• Immediately rectify failures that affect or limit the safety of the device.
• Unauthorized personnel must not have access to the devices.
Warning Signs
• Signs must always be attached in prominent positions and must be promptly replaced if
damaged.
2.3.1 Short-circuit current
The short circuit current of the PV array is only slightly higher than the maximum operating current and
also depends on irradiation conditions. If a short-circuit occurs in the system, the available fuses are
not guaranteed to switch off.
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SSM-TEN103132
SMA Solar Technology AG
Technical Description
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